/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controleur;

import application.Facade;
import application.beans.CoursBean;
import application.beans.DiscussionBean;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Étienne
 */
public class ServCours extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        HttpSession session = request.getSession();
        Facade f = new Facade();
        
        List<DiscussionBean> discussions = null;
        CoursBean cours = null;
        String next = request.getParameter(ConstantesWeb.PARAM_NEXT);
        String temp = request.getParameter(ConstantesWeb.ATTRIBUT_COURS_COURANT);
        session.setAttribute(ConstantesWeb.ATTRIBUT_LISTE_SECTIONS, f.obtenirSections());
        Integer idCours = -1;
        
        if(temp!= null){idCours = Integer.parseInt(temp);}
        
        try{
            // On va tenter de trouver le cours
            cours = f.chercherCours(idCours);
            session.setAttribute(ConstantesWeb.ATTRIBUT_COURS_COURANT, cours);
            // On va chercher les discussions du cours
            discussions = f.chercherDiscussionsCours(idCours);
            if(discussions == null){discussions = new ArrayList<DiscussionBean>();}
            session.setAttribute(ConstantesWeb.ATTRIBUT_DISCUSSIONS_COURS, discussions);
        }catch(Exception e){}
        
        // Si la page suivante est vide, on met la page d'accueil
        if(next == null || next.equals("")){next = ConstantesWeb.ATTRIBUT_PAGE_COURS;}
        // Si le cours n'existe pas, on retourne à l'accueil
        if(cours == null){next = ConstantesWeb.ATTRIBUT_SERV_ACCUEIL;}
        
        RequestDispatcher rd = getServletContext().getRequestDispatcher(next);
        rd.forward(request, response);
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
